rs london rulle tennisstrang 220mRS London is a monofilament string that gives you maximum control and spin. The spin is generated from the string's unusual four sided profile which also allows you to maintain control and stability on your hardest shots. The square profile gives the London string a thicker feel without compromising on either the feel or power that a thinner string createsThis is one of the most durable strings on the market. Specification: Color: Black Length: 220m